<template>
  <div class="login_container">
    <el-row>
      <el-col :span="12" :xs="0"></el-col>
      <el-col :span="12" :xs="24">
        <!-- 登录表单 -->
        <el-form class="login_form" :model="loginFrom" :rules="rules" ref="loginForms">
          <h1>Hello</h1>
          <h2>欢迎来到甄选</h2>
          <el-form-item prop="username">
            <el-input :prefix-icon="User" v-model="loginFrom.username"></el-input>
          </el-form-item>
          <el-form-item prop="password">
            <el-input type="password" :prefix-icon="Lock" v-model="loginFrom.password" show-password></el-input>
          </el-form-item>
          <el-form-item>
            <el-button :loading="loading" class="login_btn" type="primary" size="default" @click="login">登录</el-button>
          </el-form-item>
        </el-form>
      </el-col>
    </el-row>
  </div>
</template>
<script setup lang='ts' name='index'>
import { User, Lock } from '@element-plus/icons-vue'
import { reactive, ref } from 'vue';
import { useRouter,useRoute } from 'vue-router';
import { ElNotification } from 'element-plus';
//引入用户相关小仓库
import useUserStore from '@/store/modules/user';
//引入获取当前时间的函数
import { getTime } from '@/utils/time';
//获取路由
let $router = useRouter()
let $route = useRoute()
//按钮加载控制
let loading = ref(false)
let useStore = useUserStore()
//看表单是否验证完毕
let loginForms = ref()
//收集账号和密码的数据
let loginFrom = reactive({ username: 'admin', password: '111111' })
//登录按钮回调
const login = async () => {
  //保证全部表单验证完毕才发请求
  await loginForms.value.validate();


  //按钮加载效果
  loading.value = true
  //通知仓库发登录请求
  //请求成功->首页展示数据
  //请求失败->弹窗失败信息
  try {
    //可以.then也可以trycatch
    await useStore.userLogin(loginFrom);
    //编程式导航跳转到展示数据首页
    //判断登录是否有query登录信息
    let redirect:any = $route.query.redirect
    $router.push({path:redirect || '/'})
    //登录成功提示信息
    ElNotification({
      type: 'success',
      message: '登录成功',
      title: `HI,${getTime()}好`
    })
    //登录成功加载效果也消失
    loading.value = false
  } catch (error) {
    //登录失败加载效果消失
    loading.value = false
    ElNotification({
      type: 'error',
      message: (error as Error).message
    })
  }

}
//自定义校验规则函数
const validatorUserName = (rule: any, value: any, callback: any) => {
  //rule:校验检测对象
  //value: 即为表单元素文本内容
  //callback函数：符合条件callBack放行通过即可，不符合条件也通过callback注入错误信息
  if (value.length >= 5) {
    callback();
  } else {
    callback(new Error('账号长度至少五位'))
  }
}
const validatorPassword = (rule: any, value: any, callback: any) => {
  //rule:校验检测对象
  //value: 即为表单元素文本内容
  //callback函数：符合条件callBack放行通过即可，不符合条件也通过callback注入错误信息
  //可为正则表达式
  if (value.length >= 6) {
    callback();
  } else {
    callback(new Error('密码长度至少六位'))
  }
}


//定义表单校验需要配置对象
const rules = {
  username: [
    //requried:是否必要校验， min max 最长最多多少位， message 提示信息， trigger：触发时机 blur失去焦点 change文本变化
    // { requried: true, min: 5, max: 10, message: '账号长度至少六位', trigger: 'change' }
    { trigger: 'change', validator: validatorUserName }
  ],
  password: [
    // { requried: true, min: 6, max: 10, message: '密码长度至少六位', trigger: 'change' }
    { trigger: 'change', validator: validatorPassword }
  ]
}


</script>


<style scoped lang="scss">
.login_container {
  width: 100%;
  height: 100vh;

  background: url('@/assets/images/background.jpg') no-repeat;
  background-size: cover;
}

.login_form {
  position: relative;
  width: 80%;
  top: 30vh;
  background: url("@/assets/images/login_form.png") no-repeat;
  background-size: cover;
  padding: 40px;
}

h1 {
  color: white;
  font-size: 40px;
}

h2 {
  font-size: 20px;
  color: white;
  margin: 20px 0px;
}

.login_btn {
  width: 100%;
}
</style>